Paper winding machine



June 3, 1958 w, CLEM 2,837,293

PAPER WINDING MACHINE Filed June 27, 1955 3 Sheets-Sheet 1 INVENTORHere/l If 67am BY i ATTORNEY June 3, 1958 r c 2,837,293

PAPER WINDING MACHINE Filed June 27, 1955 5 Sheets-Sheet 2 I N VENTOR fie/ell (76172 BY LQ' MV ATTORNEY June 3, 1958 Filed June 27, 1955 E. W.CLEM PAPER WINDING MACHINE 3 Sheets-Sheet 3 REG MR PUMP RESER- on.

PuMP INVENTOR ATTORNEY Un States Pat w PAPER WINDING MACHINE Everett W.Clem, Shrewsbury, Mass., assignor to Rice- Barton Corporation,Worcester, Mass., a corporation of Massachusetts This invention relatesin general to paper winding machines, and in particular to the means formoving the reel spoolinto and out of surface contact with the largedriven reel drum or roll which drives the spool.

In conventional machines of the type disclosed herein the winding spoolis held against driving drum by means of pneumatic pressure; and thissame means, which consists of a pair of spaced pneumatic cylinders, isalso used for moving the spool and drum apart when it is desired tochange to another spool. The latter action is accomplished byintroducing compressed air against the opposite sides of the pistons.Then, after the spool and drum have been properly spaced apart, a jet ofair (or jets of air) is forced against the underside of the web in thespace between the spool and drum. As a result of this air blast, the webis blown up and over a new reel, as will appear hereinafter withparticular reference to Fig. 3 of the drawings. It is extremelyimportant that the rolls be separated the same amount at the ends;otherwise, the web will be blown to one side rather than directly up.

The difliculty encountered in the conventional apparatus described aboveis in the separating operation. The frictional forces at the ends of thespool shaft or spindle are rarely, if ever, balanced, and, since themotive force tending to overcome thesefrictional forces is acompressible fluid, it oftentimes happens that one end of the spool ismoved farther away from the drum than the other. The operator must thentry to correct for this unbalance within the limited time available tohim. It should be at once apparent that this arrangement produces a veryawkward situation.

One of the features of my invention involves the use of a, hydraulic(incompressible) fluid for moving the spool away from the drum. As willappear hereinafter, the hydraulic system will provide a positivedisplacement of the pistons and insure, at all times, a uniform movementat the ends of the spool shaft.

However, the use of pneumatic pressure to hold the spool against thedrum is also very desirable, because it gives a resiliency which isunobtainable with a hydraulic system. In many instances, the winding onthe spool is non-uniform such that the wound roll is out-of-round. Inthe case of an out-of-round roll of paper, the hydraulic system would beunable to keep this roll in constant, uniform contact with its drivingdrum. Also, when Winding relatively soft material, such as tissue paper,etc.', it

is important to have this resiliency which only the pneu-' 2,837,293Patented June 1953 ment at the ends of the winding spool when moving thelatter away from its driving drum.

Another object ofmy invention is to provide a system for the purposedescribed in which the desirable features of hydraulic pressure andpneumatic pressure are simply and effectively combined.

Other and further objects and advantageous features of my invention willhereinafter more fully appear in connection with a detailed descriptionof the drawings in which:

Fig. 1 is a front view, with some parts in section, of a paper windingdeviceembodying my invention.

Fig. 2 is a plan view of the apparatus shown in Fig. 1.

Fig. 3 is a front view, similar to Fig. 1, showing the spool and drum intheir separated relationship.

Fig. 4 is a schematic diagram of the hydraulic andpneumatic circuitsemployed in my invention.

Fig. 4a shows the four-way valve in a position re-- versed from Fig. 4.

Referring to the drawings in detail, in Fig.1, a web of paper W passesfrom the paper making machine (not shown) over the driven drum or roll 1and onto. thewinding spool 2. The spool 2 is driven in conventionalfashion by surface contact of its accumulating convolutions of paper'with the drum 1, under pneumatic pressure maintained against a pair ofpistons 3 and 4" mounted within cylinders 5 and '6, respectively. (Seealso Fig. 4.) A pair of piston rods 7 and 8 connect from the pistons 3and 4 to a pair of slide blocks 9 and 10: which are horizontallyslidable upon frame members 11. Slide blocks 9 and 10 support thecentral shaft 12 of the spool 2. I

Piston 3 divides the interior of cylinder 5 into two; chambers 13 and14; piston 4 similarly divides cylinder 6 into chambers 15 and 16. Air,under pressure, is in-" troduced into chambers 13 and 15 through pipelines 17;

and 18, respectively. Oil is introduced into chambers 14 and 16 throughpipe lines 19 and 20, respectively. The; oil is permitted to overflowfrom chambers 14 and 16 by means of pipe lines 21 and 22.

Referring now to Fig. .3, when a sufficiently large roll. of paper hasbeen wound on spool 2, and it is desired to: commence winding on a newspool.23,'spool 2 is separated from its' driving drum 1 by introducing a111688 ured quantity of oil (as will appear hereinafter) into thechambers 14 and 16 so as to force the pistons 3 and 4 to the left. Whenthe rolls have been separated several:

inches, a blast of air from air jet 24- which is attached to the doctorblade 25 will cause the slack portion of the web W to liftup (as shownin Fig. 3) and wrap a around the new spool 23. The end of the Web issnapped or cut from the filled spool 2 and the latter is removed in theslide blocks 9 and 10. The winding then continuesi- I from the slideblocks 9and 10. As the paper now'winds on the new spool 23, the latteris swung down, by its usual supporting arms (not shown) along theperiphery of drum 1 until the shaft 26 of the new spool is properlyseated in normal fashion until sufiicient paper is wound upon the newspool; at this point, the spool is again changed in the;- same manner asdescribed above. j.

Fig. 4 shows, diagrammatically, the piping conuec-r.

'tions for both the pneumatic and hydraulic circuits. For

3 Therefore, it is a principal object'of-my invention to I provide ameans for insuring positive uniform displacechambers.

the lefthand sides of. cylinders 5 and 6, as represented" by chambers 13and 15, respectively, I have provided anair pump 27 and a pair ofpressure regulators 28 and, 29-. which introduce air under controlledpressure to the 2-. valves.wi'llrpermit airto.escape when the hydraulicIPIBSrJ In order to prevent the pressures within :2

'3 su e within chambers 14 and 1:6 force Pistons 3. nd 4 respectively,to the left.

*For the hydraulic circuit, I have provided an oil pump 32-and areservoir .33 which supplies oil for said pump. Under the normaloperating conditions shown in Fig. l, with a spool urged pneumaticallyagainst its; drivingv drum, there is a constant low pressure circulationof oil through the cylinder chambers 14 and 16, so as to keep them full.Under these conditions, as shown in Fig. 4,. the hydraulic fluid (:oil)passes from pump 32, into line 34, through the four-way valve 35 andinto the line 36. From. line 36 the oil passes, in parallel, into lines37 and 38 through one-way check valves 39 and 40, through lines 19 and20, and into chambers 14 and 16, respectively. From these chambers theoil passes out from lines 21 and 22, through check valves 41 and 42 andinto common line 43. From line 43 the oil passes through valve 35 andthrough return line 44 to the reservoir 33. The pressure relief valve 45connecting from lines 37 and 38 to line 44 prevents the pressure withinthe above described circuit from rising above a predetermined low valueof pressure.

' .Valve 35 is so constructed that it is normally springurged into theposition shown in Fig, 4. However, when the time comes for a filledspool to be shifted, for spool changing purposes, into the positionshown by Fig. 3, the opera-tor turns valve '35, through 90 into theposition shown by Fig. 4a. With said valve 35 held in this Fig. 4position, the flow of oil from pump 32 .(see Fig. 4) is through line 34and valve 35, and thence, in opposite direction from its normal flow,into the line 43; from line 43 the oil passes in parallel through checkvalves 46 and 47, through flow control valves 48 and 49, through pipes19 and 20 and into the chambers 14 and 1'6, respectively. The flowcontrol valves 48 and 49 are any of various adjustable metering orflow-regulating valves commonly usedin hydraulic systems, an example ofwhich is the valve of Gardiner Patent No. 2,633,861, dated April 7,1953.

With the valve 35 moved temporarily to the position shown in Fig. 4a, itis to be noted that the pumped oil cannot take its usual and normalpassage through check valves 41 and 42 or check valves 39 and 40 becausethese check valves would be pressure closed against this directionofflow. Since lines 21 and 22 are filled withoil, the oil has no path ofescape, and hence the pressure within the chambers 14 and 16 will forcethe pistons 3 and 4, respectively, to the left. Again, since the oil isincompressible, the amount that each cylinder will move will depend uponthe quantity of oil passing through the valves 48 -and 49, rather thanthe pressure of this fluid. Therefore, the displacement of pistons 3 and4 will be positive, and, if the valves 48 and 49 are properly adjusted,the displacement of the two pistons will be equal. This establishes theseparated condition between a filled spool 2 and the driving drum 1which is illustrated in Fig. 3, permitting the filled spool to beremoved from the bearing blocks 9, 10. Thereupon, when the valve 35 isreleased, it will spring back to the position shown. in Fig. 4, so as torestore the normal low pressure. circulation of oil through the cylinderchambers 14 and 16; this allows a newly-positioned spool 23 .to be urgedagainst the driving drum 1 by the pneumatic pressure efliective in thecylinder chambers 13 and 1-5.

As described above, I have combined the desirable features of thepneumatic holding system and a hydraulic separating means into a unique,relatively simple mechanism. Under normal winding conditions, the spoolwill be urged against its driving drum pneumatically with the sameresiliency obtainable in conventional mechanisms used for the samegeneral purpose. I-Iowever, on the separating portion of theoperatingtcycle, my hydraulic circuit permits positive and equaldisplacement of the pistons, whicheffect was unobtainable' with the:pneumatic means of the prior art mechanisms. My invention has' been descibed w par cula r fe e ee 9 hen1b9fiment shown in the drawings but itshould be understood that other changes, apart from those disclosedherein, may be made within the spirit of my invention.

1 claim:

1. In a paper winding machine, a driving drum journaled in a stationarysupport, a reel spool supported at its ends in a pair of slida'blebearing blocks for sliding movement of said spool towards and away fromsaid drum, a frame structure including a pair of.,hori zontal waysadapted to receive said bearing blocks for sliding movement therein, apair of spaced hollow cylinders mounted along said ways in substantialalignment with said bearing blocks, a piston mounted within eachcylinder intermediate the ends thereof, a piston rod connecting eachpiston with its corresponding bearing block, means for introducingpneumatic pressure into each cylinder on one side only of each pistonwas to urge said spool resiliently against said drum, means forcirculating hydraulic fluid under low pressure through each cylinder onthe other side of each'piston so as to keep the hollow portion of eachcylinder on said other side of each piston full of hydraulic fluid atall times, and means for'sto'pping the circulation of said hydraulicfluid and for simultaneously introducing a measured quantity of saidfluid into said hollow portions.

2. In a paper winding machine, a driving drum journaled in a stationarysupport, a reel spool supported at its ends in a pair of slidablebearing ,blocks for sliding movement of said spool towards and away fromsaid drum, a frame structure including a pair or horizontal ways adaptedto receive said bearing blocks for sliding movement therein, a pair ofspaced hollow cylinders mounted along said way-s in substantialalignment with said bearing blocks, a p SIon mounted Within each.cylinder intermediate the ends thereof, each'piston dividing eachcylinder into a pair of closed chambers on opposite sides of saidpiston, a piston rod connecting each piston with its corresponding.bearing block, means for introducing pneumatic pressure .into onechamber only of each cylinder so, as to urge said spool resilientlyagainst said drum, means for circulating hydraulic fluid through theother chamber of each cylinder, and means for stopping the circulationof said hydraulic fluid and for simultaneously introducing apredetermined volume of said fluid into each of said other chambers.

3. In a paper winding machine, a driving drumjournaled in a stationarysupport, a freely rotatable reel.

spool supported at its ends for sliding movement towards and away fromsaid drum, a pair of spaced hollow cylinders mounted adjacent the endsof said spool, a piston slidably mounted within each cylinder andforming with said cylinder a pair of closed chambers on opposite sidesof said piston, means associated with each cylinder and piston foreffectingv sliding movement of the adjacent spool end in accordance withthe relative .slidingmcvement between said cylinder andpiston, means forintroducing pneumatic pressure into one chamber only of each cylinder soas to urge said spool resiliently against said drum, means forcirculating hydraulic fluid under low pressure through the other chamberof each cylinder so as to keep said other chambers full of hydraulicfluid at all times, and means for stopping the circulation of saidhydraulic fluid and for simultaneously introducing a measured quantityof said fluid into each ofv said other chambers so as to urge said spoolaway from said: drum.

References Cited in the file of this patent I UNITED STATES PATENTS2,176,198

Evans et a1. -Q. Mar. 8, 1955

